[{"type":"report","id":"BLC-STUDY-0669","title":"Cashu: Chaumian ecash notes on top of Bitcoin custodians","author":[{"literal":"Cashu"}],"issued":{"date-parts":[[2023]]},"publisher":"Cashu","URL":"https://github.com/cashubtc/nuts","note":"Rights status: Official external source only. Not a licence to republish the paper."}]